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Carbon-gas gel powder and its preparation

A carbon airgel and powder technology, which is applied in the field of airgel powder preparation, can solve problems such as insecurity, and achieve the effects of small pore size, high stability, and elimination of local uneven concentration

Inactive Publication Date: 2007-01-17
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is pointed out in the invention that the particle size in the carbon airgel network structure is less than 20nm, it does not specify the size of the formed stacked gel particles. The dispersion of the gel particles has an important impact on the performance of the catalyst. In the preparation process, the heating There are unsafe factors in the explosion process

Method used

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  • Carbon-gas gel powder and its preparation
  • Carbon-gas gel powder and its preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Sodium carbonate is used as a catalyst, the aqueous solution of resorcinol and formaldehyde with a concentration of 5% is used as a reaction solution 5ml, 250ml of silicone oil is used as a dispersant, ultrasonication is performed at a low temperature of 5°C for 1h, the temperature is raised to 10°C, and ultrasonication is performed for 3h, and then the temperature is raised to Continue to sonicate for 3 hours at 20°C. The nanoparticle product and the oil phase were separated by centrifugation to obtain a yellow muddy product. The sludge product was washed repeatedly with n-hexane and centrifuged. Finally, wash with ethanol and centrifuge. The centrifugation parameters are: 10000 rpm for 10 minutes to obtain a yellow ethanol suspension, which is supercritically dried with ethanol to obtain resorcinol-formaldehyde organic airgel powder. The temperature is 150 ℃ vacuum degassing, in N 2 Under protection, the temperature was raised at 1.5°C / min to 1050°C for 5 hours to o...

Embodiment 2

[0025] Repeat the method of Example 1, but the experimental conditions are 2 hours of sonication at a low temperature of 4.5°C, 3 hours of sonication at 8°C, and 3 hours of sonication at 15°C. The particle size distribution of the final product is between 50nm and 500nm, the pore size distribution is between 0.5nm and 10nm, and the specific surface area is 960m 2 / g.

Embodiment 3

[0027] Repeat the method of Example 1, but the concentration is 10% of the aqueous solution of resorcinol and formaldehyde as the reaction liquid, silicone oil as the dispersant, ultrasonication at 5°C for 1 hour, heating to 8°C for 3 hours, and then heating to 15°C. Continue to sonicate at ℃ for 3h. The temperature is 150°C, vacuum degassing, under the protection of Ar, the temperature is raised to 600°C at 1.5°C / min for 5 hours, the particle size distribution of the final product is 50nm-500nm, the pore size distribution is 0.5nm-10nm, and the specific surface area is 840m 2 / g.

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Abstract

A process for preparing nano-class or submicron-class carbon aerogel powder includes such steps as uniformly dispersing resorcin-formaldehide solution in insoluble oil phase under ultrasonic action while heating for gel polymerizing reaction, separating, washing, and carbonizing.

Description

technical field [0001] The invention relates to the field of airgel powder preparation, in particular to resorcinol-formaldehyde organic airgel powder and carbon airgel powder and a preparation method thereof. Background technique [0002] Airgel nano-powder materials are characterized by small particle size and large effective surface area. These characteristics make them have special small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect. This material has the characteristics of low atomic number, good electrical conductivity, low thermal conductivity, and biocompatibility, and has shown broad application prospects in many fields. It can be used as electrode materials for supercapacitors and high-efficiency rechargeable batteries, Cerenkov detectors, super insulation materials, catalysts and carriers, etc. [0003] U.S. Patent No. is 4997804, and 4873218 is the patent " low density resorcinol-formaldehyde aerogels " (Low density, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C08G8/20
Inventor 王朝阳唐永建闫红梅付志兵
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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